﻿using System.Text;

namespace TCommon.Extension;

public static class ByteExtension
{
    /// <summary>
    /// 字节数组转16进制字符串：空格分隔
    /// </summary>
    /// <param name="byteDatas"></param>
    /// <returns></returns>
    public static string ToHexStrFromBytes(this byte[] byteDatas)
    {
        StringBuilder builder = new StringBuilder();
        foreach (var t in byteDatas)
        {
            builder.Append($"{t:X2} ");
        }
        return builder.ToString().Trim();
    }
    /// <summary>
    /// 查表法实现Crc16
    /// </summary>
    /// <param name="pui8Data"></param>
    /// <param name="ui32Count"></param>
    /// <returns></returns>
    public static ushort GetCrc16(this byte[] pui8Data, int ui32Count)
    {
        byte[] aucCrcHi = {
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
            0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
            0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
            0x00, 0xC1, 0x81, 0x40
        };

        byte[] aucCrcLo = {
            0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7,
            0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E,
            0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9,
            0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC,
            0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
            0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32,
            0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D,
            0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38,
            0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF,
            0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
            0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1,
            0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4,
            0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB,
            0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA,
            0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
            0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0,
            0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97,
            0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E,
            0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89,
            0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
            0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83,
            0x41, 0x81, 0x80, 0x40
        };

        byte ucCrcHi = 0xFF;
        byte ucCrcLo = 0xFF;

        while (ui32Count-- > 0)
        {
            var iIndex = ucCrcLo ^ pui8Data[ui32Count];
            ucCrcLo = (byte)(ucCrcHi ^ aucCrcHi[iIndex]);
            ucCrcHi = aucCrcLo[iIndex];
        }
        return (ushort)(ucCrcHi << 8 | ucCrcLo);
    }


    /// <summary>为Modbus-RTU计算CRC16</summary>
    /// <param name="data">发送的buffer</param>
    /// <param name="numberOfBytes">需要计算crc的byte的数量</param>
    /// <param name="startByte">开始计算crc的第一个byte的下标</param>
    public static ushort CalculateCrc(byte[] data, ushort numberOfBytes, int startByte)
    {
        byte[] numArray1 = new byte[]
        {
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64,
        1,
        192,
        128,
        65,
        1,
        192,
        128,
        65,
        0,
        193,
        129,
        64
        };
        byte[] numArray2 = new byte[]
        {
        0,
        192,
        193,
        1,
        195,
        3,
        2,
        194,
        198,
        6,
        7,
        199,
        5,
        197,
        196,
        4,
        204,
        12,
        13,
        205,
        15,
        207,
        206,
        14,
        10,
        202,
        203,
        11,
        201,
        9,
        8,
        200,
        216,
        24,
        25,
        217,
        27,
        219,
        218,
        26,
        30,
        222,
        223,
        31,
        221,
        29,
        28,
        220,
        20,
        212,
        213,
        21,
        215,
        23,
        22,
        214,
        210,
        18,
        19,
        211,
        17,
        209,
        208,
        16,
        240,
        48,
        49,
        241,
        51,
        243,
        242,
        50,
        54,
        246,
        247,
        55,
        245,
        53,
        52,
        244,
        60,
        252,
        253,
        61,
        Byte.MaxValue,
        63,
        62,
        254,
        250,
        58,
        59,
        251,
        57,
        249,
        248,
        56,
        40,
        232,
        233,
        41,
        235,
        43,
        42,
        234,
        238,
        46,
        47,
        239,
        45,
        237,
        236,
        44,
        228,
        36,
        37,
        229,
        39,
        231,
        230,
        38,
        34,
        226,
        227,
        35,
        225,
        33,
        32,
        224,
        160,
        96,
        97,
        161,
        99,
        163,
        162,
        98,
        102,
        166,
        167,
        103,
        165,
        101,
        100,
        164,
        108,
        172,
        173,
        109,
        175,
        111,
        110,
        174,
        170,
        106,
        107,
        171,
        105,
        169,
        168,
        104,
        120,
        184,
        185,
        121,
        187,
        123,
        122,
        186,
        190,
        126,
        127,
        191,
        125,
        189,
        188,
        124,
        180,
        116,
        117,
        181,
        119,
        183,
        182,
        118,
        114,
        178,
        179,
        115,
        177,
        113,
        112,
        176,
        80,
        144,
        145,
        81,
        147,
        83,
        82,
        146,
        150,
        86,
        87,
        151,
        85,
        149,
        148,
        84,
        156,
        92,
        93,
        157,
        95,
        159,
        158,
        94,
        90,
        154,
        155,
        91,
        153,
        89,
        88,
        152,
        136,
        72,
        73,
        137,
        75,
        139,
        138,
        74,
        78,
        142,
        143,
        79,
        141,
        77,
        76,
        140,
        68,
        132,
        133,
        69,
        135,
        71,
        70,
        134,
        130,
        66,
        67,
        131,
        65,
        129,
        128,
        64
        };
        ushort num1 = numberOfBytes;
        byte maxValue = byte.MaxValue;
        byte num2 = byte.MaxValue;
        int num3 = 0;
        while (num1 > 0)
        {
            checked { --num1; }
            if (checked(num3 + startByte) < data.Length)
            {
                int index = num2 ^ data[checked(num3 + startByte)];
                num2 = checked((byte)(maxValue ^ numArray1[index]));
                maxValue = numArray2[index];
            }
            checked { ++num3; }
        }
        return checked((ushort)(maxValue << 8 | num2));
    }
}